Zambian President Levy Mwanawasa faces rising discontent within his ruling Movement for Multiparty Democracy (MMD) as senior party leaders accuse him of failing to rein in corruption, analysts said on Monday. Mwanawasa, who took office in 2001 vowing to get tough on graft, has seen a series of defections by top allies that analysts say could leave him in a much-weakened position ahead of a party congress in May.